Andy Furniss wrote:
Moritz Barsnick wrote:
https://ffmpeg.org/faq.html#Interlaced-video-looks-very-bad-when-encoded-with-ffmpeg_002c-what-is-wrong_003f
Scan type : Interlaced
Original scan type : Progressive
Scan type, store method : Interleaved fields
Scan order : Top Field First
We don't know what mediainfo is looking at here. I may be wrong and
mediainfo right. ;-)
I think you are right and will test later, but I still think I should
know how to get
ffmpeg/ffprobe to show such fundamental info.
So testing more with prores_ks I can get proper interlaced encoding.
There is still variation depending on how I do it that I can only see
with mediainfo.
Following the link above -
ffmpeg -f image2 -pattern_type glob -framerate 25 -i '02*.sgi' -flags
+ilme+ildct -top 1 -c:v prores_ks -profile:v hq top.mov
I get a different (according to mediainfo) file from doing -
ffmpeg -f image2 -pattern_type glob -framerate 25 -i '02*.sgi' -vf
setfield=tff -flags +ilme+ildct -c:v prores_ks -profile:v hq set.mov
It seems the second version is "more correct" - this may be irrelevant
as the frames are flagged the same, but it seems the container isn't
and the only way I know to see that is with mediainfo.
Just to bug me there's another anomaly in that I asked for hq and got
444 (not 4444) - fair enough I didn't specify pix_fmt, but I thought hq
was 422 and so does mediainfo.
mediainfo top.mov
General
Complete name : top.mov
Format : MPEG-4
Format profile : QuickTime
Codec ID : qt 0000.02 (qt )
File size : 9.06 MiB
Duration : 400ms
Overall bit rate mode : Constant
Overall bit rate : 190 Mbps
Encoded date : UTC 1904-01-01 00:00:00
Tagged date : UTC 1904-01-01 00:00:00
Writing application : Lavf56.40.101
Video
ID : 1
Format : ProRes
Format version : Version 0
Format profile : 422 HQ
Codec ID : apch
Duration : 400ms
Bit rate mode : Constant
Bit rate : 190 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 25.000 fps
Color space : YUV
Chroma subsampling : 4:4:4
Scan type : Progressive
Original scan type : Interlaced
Original scan order : Top Field First
Bits/(Pixel*Frame) : 3.663
Stream size : 9.06 MiB (100%)
Writing library : Lavc
Language : English
Encoded date : UTC 1904-01-01 00:00:00
Tagged date : UTC 1904-01-01 00:00:00
mediainfo set.mov
General
Complete name : set.mov
Format : MPEG-4
Format profile : QuickTime
Codec ID : qt 0000.02 (qt )
File size : 9.06 MiB
Duration : 400ms
Overall bit rate mode : Constant
Overall bit rate : 190 Mbps
Encoded date : UTC 1904-01-01 00:00:00
Tagged date : UTC 1904-01-01 00:00:00
Writing application : Lavf56.40.101
Video
ID : 1
Format : ProRes
Format version : Version 0
Format profile : 422 HQ
Codec ID : apch
Duration : 400ms
Bit rate mode : Constant
Bit rate : 190 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 25.000 fps
Color space : YUV
Chroma subsampling : 4:4:4
Scan type : Interlaced
Scan type, store method : Interleaved fields
Scan order : Top Field First
Bits/(Pixel*Frame) : 3.663
Stream size : 9.06 MiB (100%)
Writing library : Lavc
Language : English
Encoded date : UTC 1904-01-01 00:00:00
Tagged date : UTC 1904-01-01 00:00:00
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